Having this problem with a Google Map on a Backdrop CMS site that we're working on right now. Map is being generated with Geofield maps module. The map is divided into tiles and each tile has a drop shadow.
I assume that this is happening in our theme, but I would like to try and ask friends if they have seen this and if it might be something with Google Maps or some other conflict other than our theme.
We're having trouble isolating the source of this drop shadow with the inspect tool. Has anyone else dealt with this this? Any thoughts?
Just reporting back that we finally figured out that the problem was in the CSS for our theme. We had some drop shadow CSS that was spilling over into the Google Map.